code: def imread_numpy(filename=None):
      """Fake loader to load random data with numpy"""
      fake_img = np.random.randint(255, size=(100, 100, 3)).astype(
          np.uint8
      )
      print("test case {}", filename)
      return image2nibabel(fake_img, affine=np.eye(4))
  
file_path: NiftyNet/niftynet/io/image_loader.py
imports: from collections import OrderedDict
  import nibabel
  import numpy
  import tensorflow
  from niftynet.utilities.util_import import require_module
label_desc: Use image node_id 8 for calling a global function with example usage: imread_numpy(filename) and returns: image2nibabel